gold/testsuite/tls_test.cc

   1 // tls_test.cc -- test TLS variables for gold
   2
   3 // Copyright 2006, 2007 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 // This provides a set of test functions for TLS variables.  The
  24 // functions are called by a main function in tls_test_main.cc.  This
  25 // lets us test TLS access from a shared library.  We currently don't
  26 // bother to test TLS access between two different files, on the
  27 // theory that that is no more complicated than ordinary variable
  28 // access between files.
  29
  30 // We start two threads, and stop the second one.  Then we run the
  31 // first thread through the following cases.  Then we let the second
  32 // thread continue, and run it through the same set of cases.  All the
  33 // actual thread manipulation is in tls_test_main.cc.
  34
  35 // 1  Access to an uninitialized global thread variable.
  36 // 2  Access to an uninitialized static thread variable.
  37 // 3  Access to an initialized global thread variable.
  38 // 4  Access to an initialized static thread variable.
  39 // 5  Taking the address of a global thread variable.
  40 // 6  Taking the address of a static thread variable.
  41 // 8  Like test 1, but with the thread variable defined in another file.
  42 // 9  Like test 3, but with the thread variable defined in another file.
  43 // 10 Like test 5, but with the thread variable defined in another file.
  44 // last  Verify that the above tests left the variables set correctly.
  45
  46
  47 #include "tls_test.h"
  48
  49 __thread int v1;
  50 static __thread int v2;
  51 __thread int v3 = 3;
  52 static __thread int v4 = 4;
  53 __thread int v5;
  54 static __thread int v6;
  55
  56 // These variables are defined in tls_test_file2.cc
  57 extern __thread int o1;
  58 extern __thread int o2;
  59 extern __thread int o3;
  60
  61 bool
  62 t1()
  63 {
  64   if (v1 != 0)
  65     return false;
  66   v1 = 10;
  67   return true;
  68 }
  69
  70 bool
  71 t2()
  72 {
  73   if (v2 != 0)
  74     return false;
  75   v2 = 20;
  76   return true;
  77 }
  78
  79 bool
  80 t3()
  81 {
  82   if (v3 != 3)
  83     return false;
  84   v3 = 30;
  85   return true;
  86 }
  87
  88 bool
  89 t4()
  90 {
  91   if (v4 != 4)
  92     return false;
  93   v4 = 40;
  94   return true;
  95 }
  96
  97 // For test 5 the main function calls f5b(f5a()), then calls t5().
  98
  99 int*
 100 f5a()
 101 {
 102   return &v5;
 103 }
 104
 105 void
 106 f5b(int* p)
 107 {
 108   *p = 50;
 109 }
 110
 111 bool
 112 t5()
 113 {
 114   return v5 == 50;
 115 }
 116
 117 // For test 6 the main function calls f6b(f6a()), then calls t6().
 118
 119 int*
 120 f6a()
 121 {
 122   return &v6;
 123 }
 124
 125 void
 126 f6b(int* p)
 127 {
 128   *p = 60;
 129 }
 130
 131 bool
 132 t6()
 133 {
 134   return v6 == 60;
 135 }
 136
 137 // The slot for t7() is unused.
 138
 139 bool
 140 t8()
 141 {
 142   if (o1 != 0)
 143     return false;
 144   o1 = 10;
 145   return true;
 146 }
 147
 148 bool
 149 t9()
 150 {
 151   if (o2 != 2)
 152     return false;
 153   o2 = 20;
 154   return true;
 155 }
 156
 157 // For test 10 the main function calls f10b(f10a()), then calls t10().
 158
 159 int*
 160 f10a()
 161 {
 162   return &o3;
 163 }
 164
 165 void
 166 f10b(int* p)
 167 {
 168   *p = 30;
 169 }
 170
 171 bool
 172 t10()
 173 {
 174   return o3 == 30;
 175 }
 176
 177 bool
 178 t_last()
 179 {
 180   return (v1 == 10
 181           && v2 == 20
 182           && v3 == 30
 183           && v4 == 40
 184           && v5 == 50
 185           && v6 == 60
 186           && o1 == 10
 187           && o2 == 20
 188           && o3 == 30);
 189 }